Gas governor



G. E. BARNES.

GAS GOVERNOR.

APPLICATION FILED MAY 15, 1920.

Patented Feb. 14, 1922'.

flfiarzi 3?, 921%94 ,nors; and I do hereby CLARENCE E; BARNES, 0F \VARREN', OHIO.

eAs eovnnnon.

Application filed May 15,

To all whom it may concern:

Be it known that I, CLARENCE 1'1. BARNES, a citizen of the United States, residing at 'Warren, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Gas- Goverdeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to melting pots for type casting machines, and the like, and the object of the invention I construction of -means for automatically controlling the supply of liquid, or gaseous, fuel to the burner, or burners, beneath the pot, according to the temperature of the molten metal therewithin.

With this object in view, and others appearing. as the specification proceeds and the nature of the invention is more fully disclosed, the invention resides in the novel construction, combination and arrangement of parts, as will be hereinafter fullydescribed, summed up in the claims, and illustrated in the drawing.

The accompanying drawing clearly illustrates an exemplary form of embodiment, capable of carrying out the underlying prin ciples of the invention. Briefly described:

Figure 1 is a fragmentary sectional view of a melting pot such as is used, for instance, in type casting machines, equipped with my improvements 1 Figure 2 is a fragmentary detail view, partly in elevation and partly in section, of the upper portion of the device, constituting my invention, and showing more particularly the valve and the means for supplying the thermostatic element to the stand-pipe; and,

Figure 3 is a fragmentary sectional view in side elevation of the means for adjusting the position of the valve.

Referring now indetail to the drawing:

1 designates a receptacle, such as a melting pot, used in type casting machines and adapted to contain molten material, such as metal.

Disposed vertically within said'melting pot 1 is a tube 9, preferably of relatively lower end of the tube.

is to provide a novel Specification of Letters Patent. Patented Feb. 14;, 1922.

1920. Serial No. 381,640.

thin metal, constituting a conductor of heat. Said tube is closed at its lower end in a suitable manner, as by means of a removable plug 3, which may be threaded into said As shown, said tube is adapted to be supported with its bottom in proximity to the bottom of the receptacle 1, and at its upper end is connected in any suitable manner, as by means of threaded engagement, with a pipe 1, preferably having an elbow 5 intermediate its length, and the portion 6 of said pipe projecting vertically above the receptacle 1 is threaded at its free end for engagement with the internally threaded end of a valve casing 7. As shown, said valve casing is hollow and the pipe 6 communicates with the hollow chamber thereof. Said valve casing is provided with an upper lateral flange -8, adapted, as "shown at 9, for engagement with the threaded end of an inlet pipe 10, leading from a suitable source of fuel supply, either liquid or gaseous.

Suitably secured to the flange 8, as by means of bolts 11 carrying nuts 12 on the threaded ends thereof, is a cover 13, provided with a dished portion 14 and with a hollow nipple 15 for engagement with the threaded end of an outlet pipe 16, leading to the burner, or burners, beneath the melting pot 1.

The valve casing 7 is provided with an inlet port 17, normally closed by a threaded plug 18. By removing the plug 18 a suitable expansible thermostatic medium", such as mercury, 19 may be filled into the pipe 6 and into the tube 2 until the level of such 7 mercury is slightly below the flange 8 of the valve casing WVithin said valve casing 7 are disposed valves 19, preferably steel balls, one, or a number of which, may be used as desired, and, as herein shown, three of such balls are given as an example. Said balls are superposed within the valve casing 7 and float upon the body of mercury within the pipe 6 and tube 2.

The valve casing 7 is provided with a second nipple 20 for the reception of a screw 21 of a diameter approximating the diamete of the bore of said nipple. The bore of said nipple is enlarged at the outer end thereof to provide a recess for the reception of a packing or gasket 22 and the free end of said nipple is closed by a screw cap 23, through which said screw 21 is threaded, as

shown. By moving said threaded member in and out of the nipple 20, the mercury therewithin is'displa-ced, so as to raise or lowe the valves 19 and thus bring the top valve nearer to or farther away from the bottom of the opening through the nipple 15, thus contracting or enlarging the passage of the fuel to said pipe 16.

In operation, the device is adjusted so that the mercury will not act to close the valves 19' until the temperature of the molten metal within the melting pot 1 eXceeds'approximately 550 E, which is the right temperature "for casting perfect slugs or lines of type. As the metal is withdrawn from the pot, the remaining metal therewithin becomes increasingly hotter, so that the mereury expands and causes the steel balls, or valves 19 to rise, thus progressively de creasing the space for the passage of the fuel through said pipe 16, asthe temperature within the pot increases, thus decreas ing the feed of the fuel and thereby keeping the molten metal at the desired temperature. My device embodies no springs which are likely to weaken, and no rubber which has a tendency to rot, and by means of thesteel balls, the mercury is kept far enough from the gas feed and outlet so that there is no the gas pipes by the pressure for metals of a casing "signature.

chance of the mercury being blown out into of the gas. What I claim to be new is: 1. The combinationwith a melting pot providing a chamber having an inlet and outlet port, a'tube closed at the lower end extending downwardly into the pot and having its upper end opening into the casing, a thermal responsive liquid in the tubeand casing and stopping short of the chamber, and a. plurality of superposed balls within the casing floated upon the liquid, the upper being adapted to approach the outlet port and vary the overflow.

2. The combination with a melting pot for metals of a casing providing a chamber having an inlet and an outlet port, a tube closed at its lower end extending downwardly into the pot and having its upper end opening into the casing, a thermal responsive liquid in the tube and easing stopping short of the chamber, a ball adapted to approach the outlet port and vary the overflow, and means within the casing'floating upon the liquid and supporting the ball. In testimony whereof I hereunto aflix my CLARENCE E. BARNES. 

